WO2017031825A1

WO2017031825A1 - Degradable and recyclable cloth base material and preparation method therefor

Info

Publication number: WO2017031825A1
Application number: PCT/CN2015/092955
Authority: WO
Inventors: 顾珂里; 郭玉顺; 郭华; 顾钰良; 徐国华; 陈杭慧
Original assignee: 江苏华跃纺织新材料科技有限公司
Priority date: 2015-08-23
Filing date: 2015-10-27
Publication date: 2017-03-02
Also published as: CN106467992A

Abstract

Disclosed is a preparation method for a degradable and recyclable cloth base material. The cloth base material comprises warp (1), weft (2), and slurry (3). The method comprises: preparing warp (1) and weft (2) by using tencel fiber as a raw material; preparing a raw cloth by using a machine weaving method; and performing craft processing on the raw cloth so that the raw cloth becomes a cloth base material with slurry (3) on two faces. This cloth base material has relatively desirable heat resistance performance, a low percent elongation in use, and a high flatness on the surface, and is not easily wrinkled. This product may be recyclable after inefficacy, or may be degraded by microorganisms in the soil without generating a noxious material in a natural environment condition, thereby avoiding environment pollution. In addition, a raw material of tencel fiber is a needle tree material which is recyclable and has low costs.

Description

Degradable recycling and reuse cloth substrate and preparation method thereof

Technical field

The invention relates to the field of coated abrasives, in particular to a degradable recycled cloth substrate and a preparation method thereof.

Background technique

Since the reform and opening up, the national economy has grown rapidly. "Science and technology innovation, independent innovation" has become the mainstream of domestic industrial development. China's industry is gradually developing towards intensive, energy-saving and emission-reducing, low-carbon. The substrate is one of the three components of the coated abrasive and is the carrier of the abrasive and the binder. The base of the coated abrasive has the following requirements: strong bonding ability to the adhesive, flexibility, tensile strength, small elongation and surface smoothing. With the development of the industry, the emergence of new synthetic metal materials, the improvement of processing precision requirements and the improvement of people's sustainable development and environmental protection awareness have brought new requirements to the base of coated abrasives. On the one hand, in the field of new synthetic metal processing, higher tensile strength and high temperature resistance are required for coated abrasives. Because the temperature generated in the metal grinding process is relatively high and the cutting force is large, if the thermal melting point and tensile strength of the base material are low, obvious deformation or fracture occurs during the processing, which may cause the abrasive grains on the surface of the abrasive cloth to fall off and the coated abrasive device to fail. , shorten the service life and affect the processing accuracy of the product. At present, domestic coated abrasives are mainly made of some coarse-grained and low-precision abrasive belt products, which have a large gap with the world counterparts, and it is difficult to meet the precision requirements of metal product processing. On the other hand, after the failure of the coated abrasive belt products, the matrix made of polyester fiber is difficult to be degraded under natural environmental conditions, and it is difficult to handle the recycling problem, causing pollution to the environment, and the synthetic fiber-dependent oil. The resources are gradually depleted, and the supply gap of textile fiber raw materials is very large. It is necessary to make full use of biomass resources, crop waste resources and waste textile recycling resources to further develop new visions of fiber raw materials. In order to solve the above problems, the scientific and technological personnel of scientific research units have continuously researched and explored and developed new high-quality, degradable coated abrasive bases. Although some progress has been made in technology, there are still no actual applications. Overcoming technical problems.

Summary of the invention

The object of the present invention is to overcome the above deficiencies, and to provide a substrate which can be degraded and recycled and reused, and the substrate made of Tencel fiber (domestic trade name, internationally known as lyocell fiber) has high thermal deformation point, and is in use. The elongation rate is small, it is not easy to wrinkle, and the surface is flat. It can be recycled after the product fails, completely dissolved and reused by amine oxide, and can be degraded by microorganisms in the soil under natural environmental conditions, no toxic substances are generated, space is occupied, environmental pollution is avoided, and the raw material of Tencel is conifer. The main wood pulp is a renewable resource.

The technical solution adopted by the invention to solve the technical problem is that the warp yarn, the weft yarn and the slurry are contained, and the warp yarn and the weft yarn are made of the tencel fiber as the raw material, and the original cloth is made by the weaving method, and the original cloth is processed by the process. A slurry is formed on both sides to form a cloth substrate.

The degradable recycled cloth substrate is produced as follows:

Weaving weaving - inspection - shaving, singeing - desizing, scouring, washing - dyeing, tenter shaping - sizing - calendering

First, weaving weaving

The rayon yarn is used as a raw material to be purely spun into a yarn, and the Tencel yarn is used as a warp and weft yarn to woven a raw fabric of a degradable substrate on a loom.

The main quality indicators of the original cloth:

Weight (g/m ² ): 120-160 Fabric structure: plain or twill

Warp and weft density (root / cm) 20.5-40 warp and weft number (dtex) 295-150

Fabric thickness (mm): 0.3-0.7:

Second, check

Check the tensile strength, elongation and surface quality of the original fabric, and pick out the defects such as oil stains, curling, and agglomeration.

Third, shaving, singeing

The original cloth passes through a shaving machine to remove surface impurities, brush off the dust and yarn ends of the fabric surface, and erect the pile to singe. The shaved original cloth is passed through a singeing machine to remove the surface fluff of the fabric, so that the surface of the fabric is smooth.

Fourth, desizing, scouring, washing

1. Dip the fabric treated in the previous process into an alkali tank to make the fabric soaked in the alkali liquor;

2. The fabric after being immersed in the alkali solution is placed in a steam environment of 90-100 ° C for 2-3 hours to decompose the slurry;

3. Immerse the cooked fabric in a neutralization tank and then into the cleaning tank to clean the surface slurry decomposition product.

4. The cleaned fabric is dried by a dryer.

5. Dyeing and tentering

1. Using direct dyeing treatment method, firstly wet with warm water of 40-60 ° C, and then dyeing in the dyeing liquid of 70-95 ° C for 30-60 minutes, and then fix the color.

2. Dry the dyed fabric with a dryer.

3. The setting temperature is 195±5°C.

Sixth, sizing

1. The fabric is back sizing with phenolic resin and acrylic resin, and the fabric is sizing with rubber latex, and sizing by squeegee.

2. Dry the sized fabric to maintain a moisture content of 10-15%.

Seven, calendering

The dried fabric is calendered by a calender to make the surface of the substrate flat, the film and the fabric are pressed and firmed, and the elongation is lowered.

Main technical indicators of degradable recycling and reuse of cloth substrates:

Weight (g/m ² ): 120-160 Elongation (600N) (%): 3-5

Thickness (mm): 0.3-0.7: Elongation at break (%): 5-10

Tensile strength (warp direction) (N/5cm): 900-1600

The principle adopted by the present invention to solve the technical problem is that the Tencel raw material is derived from wood and can be naturally regenerated. After the product fails, it can be biodegraded without polluting the environment. In terms of performance, the heat resistance temperature of Tencel fiber can reach up to 300 degrees, and it has strong tensile and deformation resistance after being treated by sizing and other processes. It is resistant to high temperature, is not easily deformed, and has a very low elongation during use.

The invention has the beneficial effects that the cloth substrate has better heat resistance, has small elongation in use, is not easy to wrinkle, and has high surface flatness. After the product is ineffective, it can be recycled and reused. Under natural environmental conditions, the microbial degradation in the soil will not produce toxic substances, avoiding pollution to the environment, and the raw material of Tencel fiber is coniferous wood, which is renewable and low in cost.

DRAWINGS

The following is a further description of the present invention in conjunction with the accompanying drawings and embodiments;

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of a degradable recycled cloth substrate.

In the figure, 1. warp yarn, 2. weft yarn, 3. pulp.

Detailed ways

In Fig. 1, the warp yarn 1 and the weft yarn 2 are made of Tencel fiber as a raw material, and the original fabric is obtained by a woven weaving method, and then processed into a substrate by a post-processing, and the original cloth has a slurry 3 on both sides.

The degradable recycled substrate is prepared as follows:

Weaving - inspection - shaving, singeing - desizing, scouring - dyeing, tenter shaping - sizing - calendering

First, weaving weaving

The raw yarn is spun into a yarn by using the Tencel fiber as a raw material, and the above-mentioned yarn is used as a raw fabric of a warp and weft yarn woven into a degradable substrate on a loom.

The main quality indicators of the original cloth:

Weight (g/m ² ): 120-160 Fabric structure: plain or twill

Warp and weft density (root / cm) 20.5-40 warp and weft number (dtex) 295-150

Fabric thickness (mm): 0.3-0.7:

Second, check

Check the tensile strength, elongation and surface quality of the original fabric, and pick out the defects such as oil stains and curling.

Third, shaving, singeing

The original cloth is passed through a shaving machine to remove surface impurities, brush the surface dust and yarn ends of the fabric, and the pile is erected for singeing. The shaved original cloth is passed through a singeing machine to remove the surface fluff of the fabric, so that the surface of the fabric is smooth.

Fourth, desizing, scouring

4. The cleaned fabric is dried by a dryer.

5. Dyeing and tentering

1. Using direct dyeing treatment method, first wet with 40-60 ° C warm water, then put into the dyeing liquid temperature of 70-95 ° C for 30-60 minutes for dyeing, and then fix the color.

2. Dry the dyed fabric with a dryer.

Sixth, sizing

1. The back side of the fabric is sizing with phenolic resin and acrylic resin, and the front side of the fabric is sizing with rubber latex, and sizing by squeegee.

2. Dry the sized fabric to maintain a moisture content of 10-15%.

Seven, calendering

The dried fabric is calendered by a calender to make the surface of the substrate flat, and the film and fabric are squeezed to reduce the elongation.

Weight (g/m ² ): 120-160 Elongation (600N) (%): 3-5

Thickness (mm): 0.3-0.7: Elongation at break (%): 5-10

Tensile strength (warp direction) (N/5cm): 900-1600

Tencel raw materials come from wood and can be naturally regenerated. The production process is mature and the cost is the same as cotton. After use, it can be biodegraded and recycled for reuse. The recovery rate of the oxidizing agent used for oxidizing agents is over 99%, which will not pollute the environment in recycling production. In the performance, the heat resistance temperature of Tencel fiber can reach 300 degrees, and it has stronger tensile, deformation and high temperature resistance after sizing and calendering. The stenting and calendering can reduce the elongation during use. . After the product is deactivated, it can be quickly aged under the natural environment conditions, sunlight and microorganisms, and degraded by microorganisms in the soil, which will not produce toxic substances and avoid polluting the environment.

Claims

A degradable recycling and recycling cloth substrate and a preparation method thereof, comprising warp yarn, weft yarn and slurry, and the warp yarn and the weft yarn are made of the tencel fiber as the raw material, and the original cloth is made by the weaving method, and the original cloth is processed by the process. After the treatment, the slurry was formed into a cloth substrate on both sides.
A degradable recycled cloth substrate according to claim 1 and a preparation method thereof, comprising the following steps:

Weaving weaving - inspection - shaving, singeing - desizing, scouring - dyeing, tenter shaping - sizing - calendering

First step: weaving weaving

The rayon yarn is used as a raw material to be purely spun into a yarn, and the Tencel yarn is used as a warp and weft yarn to woven a raw fabric of a degradable substrate on a loom.

The main quality indicators of the original cloth:

Weight (g/m 2 ): 120-160 Fabric texture: plain or twill

Warp and weft density (root / cm) 20.5-40 warp and weft number (dtex) 295-150

Fabric thickness (mm): 0.3-0.7:

Second step: check

Check the tensile strength, elongation and surface quality, and pick out the defects such as oil stains, curling, and agglomeration.

The third step: shaving, singeing

The original cloth passes through a shaving machine to remove surface impurities, brush off the dust and yarn ends of the fabric surface, and erect the pile to singe. The shaved original cloth is passed through a singeing machine to remove the surface fluff of the fabric, so that the surface of the fabric is smooth.

The fourth step: desizing, scouring

1. Dip the fabric treated in the previous process into an alkali tank to make the fabric soaked in the alkali liquor;

2. The fabric after being immersed in the alkali solution is placed in a steam environment of 90-100 ° C for 2-3 hours to decompose the slurry;

3. Immerse the cooked fabric in a neutralization tank and then into the cleaning tank to clean the surface slurry decomposition product.

4. The cleaned fabric is dried by a dryer.

The fifth step: dyeing, tentering and shaping

1. Using direct dyeing treatment method, firstly wet with warm water of 40-60 ° C, and then dyeing in the dyeing liquid of 70-95 ° C for 30-60 minutes, and then fix the color.

2. Dry the dyed fabric with a dryer.

Sixth step: sizing

1. The fabric is back sizing with phenolic resin and acrylic resin, and the fabric is sizing with rubber latex, and sizing by squeegee.

2. Dry the sized fabric to maintain a moisture content of 10-15%.

Seventh step: calendering

The dried fabric is calendered by a calender to make the surface of the substrate flat, and the film and fabric are squeezed and lowered. Low elongation.